Clamp



April 22, 1930. A. 1 NELSON 1,755,454

CLAMP Filed June l5, 1925 @MMMMMIA akten/m130 Patented Apr. 22, 1930 UNITED STATES ritira-1 secr. l

ADOLPH L. NELSON, OF DETROIT,

MICHIGAN, Assrsn'on'roronn ALUMrNUM a BRAss CORPORATION, OF DETROIT, :MICHIGAN @AMB Application mea June 15, 1925. serial No. 37,316.

the invention resides in the novel features ofl construction and combinations and arrangements of parts as more fully hereinafter set forth,

In the drawings Figure 1 `is an end View of a permanent mold having a clamp embodying my invention;

Figure 2 is a plan view thereof section on the line 2 2 of Figure 1.

As shown in the present instance 1 and 2 are complementary sections of the permanent mold, the ends of which are pivotally connected to each other at 3. 4 is a core insertable downwardly between the sections 1 and 2 and cooperating therewith in forming the mold cavity. The mold sections in addition partly in to being exposed to the heat of the molten metal entering the mold cavity are also preferably exposed to the heat of gas or the like flames directed against the mold sections.

To clamp the mold sections together I have provided the clamping member 5 and the cooperating clamping member 6, which are located at the end of the mold opposite its pivotal end. One end of the clamping memberV 5 is pivotally connected between the spaced furcations 7 projecting laterally from theV mold section 1 by means of the pin 8 extending through the furcations and the laterally enlarged portion 9 of the clamping member. The opposite end of the clamping member 5 is provided with the laterally hooked portlon 10, which is engageable between the spaced furcations 11 projecting laterally from the mold section 2. The cooperating clamping member 6 is in the formof a pin 12 having at .when the latter is its upper end the transverse handle 13. This pin is insertable downwardly through the :turcations l1 and has cylindrical bearing portions 14 for engaging these furcations and the intermediate cam portion 15 for engaging the shoulder 16 upon the hooked portion 10 'of the clamping member 5. This cam portion e 15 preferably has the diverging Hat sides 17 and 18 which are so arranged relative to the shoulder 16 of the clamping member 5 that in clamping position clearance is provided between thisshoulder and the flat sides. However, the mold sections 1 and 2 cannot be entirely separated but can be slightly separated a sulicient distance to 'Y permit convenient'insertion of the core 4 from between the mold sections. portion 15 also has the cam surface 19 leading from ythe flat face 18 and arranged so that when the cooperating clamping member 6 is y rotated the cam face will have a rolling conv The cam tact with the shoulder 16 of the clamping v member 5, and will gradually, during the rotation, move the mold sections toward each other and finally clamp the saine firmly toi" gether.

To provide for the ready removal of the clamp and the renewal of its parts there is slight clearance between the pin 8 and the furcations 7 and clamping member 5. There is also slight clearance between the cylindrical bearing portions 14: of the cooperating clamping members 6 and the furcations 11. Also the cam portion 15 of this cooperating clamping member is reduced so that it does not contact wtih the furcations 11. The pin 8 and the cooperating clamping member 6 are suitably held from dropping through v their respective furcations by means of a head upon the pin and a transverse pin below the i cooperating clamping member.

l/Vith this arrangement it will be seen that even with the cooperating clamping members at high temperature they will work eliiciently and have a long life owing to the rolling contact therebetween. It will also be seen thatthey are so arranged that the mold sections niay be clamped either firmly together or slightly spaced apart.

ISO

What I claim as my invention is:

The combination with relatively movable sections, of a clamping member eonnected to one of seid sections, and a cooperating clamping member rotatively mounted upon the other of said sections and provided with a Cam portion having a flat a/ee. and v:1r-eem Y face alternatively engageable with saidrfirst mentioned clamping member to clamp said 1; .3 sections indierent positions, said eamfaoe being arranged to provide a rolling'o'onta'ot With said rst mentioned clamping member.

In testimony whereof I aix my signature.

ADOLPII `L.Y NELSON. Y 

